package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.ShoppingCart;
import com.itheima.reggie.entity.User;
import com.itheima.reggie.service.ShoppingCartService;
import com.itheima.reggie.service.UserService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

@RestController
@RequestMapping("/shoppingCart")
@Slf4j
public class ShoppingCartController {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;

    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart){
        Long userid = BaseContext.get();
        shoppingCart.setUserId(userid);
        Long dishId = shoppingCart.getDishId();
        LambdaQueryWrapper<ShoppingCart> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,userid);
        if (dishId!=null){
            queryWrapper.eq(ShoppingCart::getDishId,dishId);
        }else{
            queryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
        }
        ShoppingCart shoppingCartone = shoppingCartService.getOne(queryWrapper);
        if (shoppingCartone!=null){
            Integer number = shoppingCartone.getNumber();
            shoppingCartone.setNumber(number+1);
            shoppingCartService.updateById(shoppingCartone);
        }else{
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            shoppingCartone=shoppingCart;
        }
        return R.success(shoppingCartone);
    }
    @DeleteMapping
    public R<String> clean(){
        LambdaQueryWrapper<ShoppingCart> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(BaseContext.get()!=null,ShoppingCart::getUserId,BaseContext.get());
        shoppingCartService.remove(queryWrapper);
        return R.success("清空购物车成功");
    }


    @GetMapping("/list")
    public R<List<ShoppingCart>> list(){
        Long userid = BaseContext.get();
        LambdaQueryWrapper<User> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(userid!=null,User::getId,userid);
        User user = userService.getOne(queryWrapper);
        if (user==null){
            throw new CustomException("用户未登录,无法查询购物车");
        }
        LambdaQueryWrapper<ShoppingCart> shoppingCartLambdaQueryWrapper=new LambdaQueryWrapper<>();
        shoppingCartLambdaQueryWrapper.eq(ShoppingCart::getUserId,BaseContext.get());
        List<ShoppingCart> list = shoppingCartService.list(shoppingCartLambdaQueryWrapper);


        return R.success(list);

    }
}
